Grease filter assembly for

ABSTRACT

A grease filter assembly for use in a range hood to remove airborne grease is disclosed to include an air deflector with guide rollers and grille, a roll of grease filter mounted in a filter supply chamber at the air deflector with one end of the grease filter extending out of the filter supply chamber over the grilles and the guide rollers into a waste filter collecting chamber, and a motor mounted in the air deflector and controllable to transfer the grease filter into the waste grease collecting chamber by means of a sheet-transfer cylinder and an impression cylinder.

BACKGROUND OF THE INVENTION

(a) Technical Field of the Invention

The present invention relates to grease filters for range hood and more particularly, to a grease filter assembly that collects waste grease filter and supplies new grease filter automatically.

(b) Description of the Prior Art

Regular range hoods include two types, i.e., the type with grease filter and the type without grease filter. A range hood without grease filter directly sucks in waste gas and then expels intake waste gas to the outside through an exhaust duct. The wind tunnel and fan blades of a rang hood without grease filter will be covered with a layer of grease after a certain period of time in application. When the internal parts of a range hood are covered with a layer of grease, the fan speed will be affected, lowering the performance. Therefore, a range hood without grease filter must be regularly cleaned.

A range hood with grease filter has a grease filter covered on each waste gas inlet for collecting airborne grease from intake waste gas, keeping the internal wind tunnel in a clean status. The grease filter is affixed in place. When collected a certain amount of grease, the grease filter must be replaced, and the grille must be detached from the hood and cleaned. However, removing the grease filter from the hood for a replacement must be done manually. This grease filter replacement procedure is complicated. When removing the grease filter from the hood, the hands will be contaminated with grease.

SUMMARY OF THE INVENTION

The primary purpose of the present invention is to provide a grease filter assembly that eliminates the aforesaid problems. It is the main object of the present invention to provide a grease filter assembly for range hood, which collects waste grease filter and supplies new grease filter automatically.

To achieve this and other objects of the present invention, the grease filter assembly comprises an air deflector, which has a filter supply chamber and a waste filter collecting chamber and provided with guide rollers grilles around the border area, a motor mounted on the air deflector, a sheet-transfer cylinder coupled to and rotatable by the motor, an impression cylinder perpendicularly pivoted to the air deflector in proximity to the sheet-transfer cylinder in a parallel manner, and a roll of grease filter mounted in the filter supply chamber for enabling one end of the grease filter thereof to be pulled out of the filter supply chamber and extended over the grilles and the guide rollers and retained between the sheet-transfer cylinder and the impression cylinder and then inserted into the waste filter collecting chamber. When the part of the grease filter that extends out of the filter supply chamber is covered with a certain amount of collected grease after a long use, the motor is started to rotate the sheet-transfer cylinder, causing the sheet-transfer cylinder and the impression cylinder to transfer the grease filter forwards, for enabling the waste part of the grease filter to be received in the waste filter collecting chamber.

The foregoing object and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.

Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an eF6 is a schematic plain view of a great filter assembly in accordance with the present invention.

FIG. 2 is an elevational view of the great filter assembly in accordance with the present invention.

FIG. 3 shows an application example of the present invention.

FIG. 4 corresponds to FIG. 3, showing the great filter assembly installed in the range hood.

FIG. 5 shows another application example of the present invention.

FIG. 6 shows still another application example of the present invention.

FIG. 7 shows still another application example of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following descriptions are of exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.

Referring to FIGS. 1 and 2, a grease filter assembly 1 in accordance with the present invention is shown comprising an air deflector 11, which is mountable in a range hood and has a filter supply chamber 12 and a waste filter collecting chamber 13 arranged on a middle part of its one side, namely, the back side, a plurality of guide rollers 16 mounted on the back side of the air deflector 11 at locations in a predetermined grease filter dispensing path, a plurality of grilles 17 perpendicularly arranged on the back side of the air deflector 11 along the border area between each two adjacent guide rollers 16, a motor 15 mounted on the back side of the air deflector 11 near an inlet (not shown) of the waste filter collecting chamber 13 and having an output shaft made in the form of a sheet-transfer cylinder 151 and extending to the outside, an impression cylinder 152 perpendicularly pivoted to the back side of the air deflector 11 in proximity to the sheet-transfer cylinder 151 in a parallel manner, a roll of grease filter 14 mounted in the filter supply chamber 12 for enabling the grease filter 14A to be pulled out of the filter supply chamber 12 and extended over the grilles 17 and the guide rollers 16 and retained between the sheet-transfer cylinder 151 and the impression cylinder 152 with one end of the grease filter 14A inserted into the inlet of the waste filter collecting chamber 13. When grease filter assembly 1 is assembled, the grease filter 14A constitutes an upright wall on the back side of the air deflector 11 around the border area (see FIG. 2).

Referring to FIGS. 3 and 4, a range hood 2 is shown having two waste gas inlets 21. The grease filter assembly 1 is mounted in the range hood 2 with its back side facing the waste gas inlets 21. During operation of the range hood 2, waste gas is sucked from the gas range (not shown) through the grease filter 14A into the waste gas inlets 21 so that the grease filter 14A removes grease and solid particles from the flow of waste gas passing therethrough.

Referring to FIGS. 1˜4 again, when the grease filter 14A gathered a certain amount of grease or after a certain period of time in application, the user can start the motor 15 to rotate the sheet-transfer cylinder 151. At this time, the grease filter 14A is delivered forwards by the sheet-transfer cylinder 151 and the impression cylinder 152, enabling the waste grease filter 14B to be collected in the waste filter collecting chamber 13.

In the application example shown in FIG. 3, the grease filter assembly 1 is installed in a range hood in a vertical position. Alternatively, the grease filter assembly 1 can be used in a range hood of which the waste gas input side is kept in horizontal, as shown in FIG. 5, or in an oblique position, as shown in FIG. 6. The grease filter assembly 1 can also be used in big-scale horizontal cook hood, as shown in FIG. 7.

A grease filter assembly for use in a range hood to remove airborne grease is disclosed to include an air deflector with guide rollers and grille, a roll of grease filter mounted in a filter supply chamber at the air deflector with one end of the grease filter extending out of the filter supply chamber over the grilles and the guide rollers into a waste filter collecting chamber, and a motor mounted in the air deflector and controllable to transfer the grease filter into the waste grease collecting chamber by means of a sheet-transfer cylinder and an impression cylinder.

It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.

While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention. 

1. A grease filter assembly for use in a range hood, comprising: an air deflector mountable in a range hood, said air deflector having a back side, a filter supply chamber and a waste filter collecting chamber arranged on a middle part of said back side, a plurality of guide rollers mounted on said back side at locations in a predetermined grease filter dispensing path, and a plurality of grilles perpendicularly arranged on said back side along the border area of said back side between each two adjacent guide rollers, a motor mounted on the back side of said air deflector near said waste filter collecting chamber; a sheet-transfer cylinder coupled to and rotatable by said motor; an impression cylinder perpendicularly pivoted to the back side of said air deflector in proximity to said sheet-transfer cylinder in a parallel manner for pressing a grease filer on said sheet-transfer cylinder for enabling the grease filter to be delivered forwards; and a roll of grease filter mounted in said filter supply chamber for enabling one end of the grease filter thereof to be pulled out of said filter supply chamber and extended over said grilles and said guide rollers and retained between said sheet-transfer cylinder and said impression cylinder and then inserted into said waste filter collecting chamber. 